Rockwell Automation Publication 193-UM015D-EN-P - February 2015 235
Protective Trip and Warning Functions Chapter 6
Under Power Factor Lagging Trip Level
Under Power Factor Lagging Trip Level (Parameter 412) allows you to define the
power factor lagging at which the E300 Electronic Overload Relay trips on an
under power factor lagging. It is user-adjustable from 0…2,000,000 kW.
Table 289 - Under Power Factor Lagging Trip Level (Parameter 412)
Under Power Factor Lagging Warning
The E300 Electronic Overload Relay indicates an Under Power Factor Lagging
warning if:
• No warning currently exists
• Under Power Factor Lagging Warning is enabled
• Current is present
• Voltage is present
• Under Power Factor Lagging Inhibit Time has expired
• The total power factor lagging is equal to or less than the Under Power
Factor Lagging Warning Level
When the Under Power Factor Lagging Warning conditions are satisfied, the:
• TRIP/WARN LED flashes a yellow 2-long / 9-short blink pattern
• Bit 8 in Power Warning Status (Parameter 12) sets to 1
• Bit 1 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Warning Alarm close
Under Power Factor Lagging Warn Level
Under Power Factor Lagging Warn Level (Parameter 413) allows you to define
the power factor lagging at which the E300 Electronic Overload Relay indicates a
warning. It is user-adjustable from 0…2,000,000 kW.
Default Value -90
Minimum Value -100
Maximum Value 0
Parameter Type SINT
Size (Bytes) 1
Scaling Factor 1
Units %
The Under Power Factor Lagging Inhibit Time starts after a phase voltage
transitions from 0V to 20V L-L and a phase of load current transitions from 0 A
to 30% of the minimum FLA setting of the device. The E300 Electronic Overload
Relay does not begin monitoring for an under power factor lagging condition
until the Under Power Factor Lagging Inhibit Time expires.
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